Make referenceBases non-optional
Make referenceBases non-optional
lh3/schemas,Jeltje/ga4gh-schemas,laserson/schemas,saupchurch/schemas,dnanexus-rnd/schemas,diekhans/ga4gh-schemas,buske/schemas,pcingola/schemas,buske/schemas,kellrott/schemas,lh3/schemas,delagoya/schemas,benedictpaten/schemas,macieksmuga/schemas,ga4gh/schemas,Jeltje/ga4gh-schemas,dcolligan/schemas,delagoya/schemas,ga4gh/ga4gh-schemas,heuermh/ga4gh-schemas,nlwashington/schemas,sarahhunt/schemas,adamnovak/schemas,diekhans/ga4gh-schemas,adamnovak/schemas,hjellinek/schemas,hjellinek/schemas,nlwashington/schemas,kellrott/schemas,laserson/schemas,dnanexus-rnd/schemas,dglazer/schemas,benedictpaten/schemas,hjellinek/jeltje-schemas-sphinx,sarahhunt/schemas